Integrating viscoelastic mass spring dampers into position-based dynamics to simulate soft tissue deformation in real time.

ABSTRACT: We propose a novel method to simulate soft tissue deformation for virtual surgery applications. The method considers the mechanical properties of soft tissue, such as its viscoelasticity, nonlinearity and incompressibility; its speed, stability and accuracy also meet the requirements for a surgery simulator. Modifying the traditional equation for mass spring dampers (MSD) introduces nonlinearity and viscoelasticity into the calculation of elastic force. Then, the elastic force is used in the constraint projection step for naturally reducing constraint potential. The node position is enforced by the combined spring force and constraint conservative force through Newton's second law. We conduct a comparison study of conventional MSD and position-based dynamics for our new integrating method.

SUBMITTER: Xu L 

PROVIDER: S-EPMC5830759 | biostudies-literature | 2018 Feb

REPOSITORIES: biostudies-literature